Patent GB-191409345-A (GB)
Title: Improvements in or relating to Machines for Making Envelopes.
Inventor: FAIRWEATHER HAROLD GEORGE CRUI
IPC: B31B19/00
Filed: 1914-04-15
Granted: 1915-04-15
Abstract: 9345. Fairweather, H. G. C., [Schmidt, F. L.]. April 15 Envelopes, making.- Relates to a machine for making envelopes of large size, known as catalogue envelopes, and consists in providing means for straightening the blank and synchronizing it with the various folding and creasing devices while it is moving through the machine, means for adjusting the various mechanisms to suit the size of the blank, and means for gumming the sealing-flaps of the envelopes at blanks are fed from a pile into the machine, and are straightened, before being fed into the folding- mechanism. by means of the mechanism described in Specification 13,932/13. [Class 100 (i), Feeding and delivering webs &c.]. Two feed-belts 30, Fig. 1, are employed to feed the blanks, and the pulleys of one of them are fixed to shafts 16, 17, while the pulleys 14, 18 of the other are loose on these shafts. The pulleys 14, 18 are engaged by forks 24, 25 respectively, which are fixed to a hub 23 on a screwed shaft 21. Thus, by rotating the shaft 21, one of the belts can be moved to suit the size of blank used. The position of the feed-rolls 6 on their shafts can also be adjusted. The blank next passes beneath the creasing-rolls 193 that form the creases along which the side flaps are folded, and above a gumming-wheel 198 which applies a line of gum to the edge of one of the side flaps. The blank is then gripped between feed-belts and carried past a number of blades or rails 153, which turn the side flaps over on to the body of the envelope. One of the lower feed-belts 32, Figs. 1 and 2, passes around pulleys 34, 36 which are feathered on the shafts 35, 37 respectively. The hubs of these pulleys are engaged by a bar 39 which is secured to nuts on screwed shafts 40, 41, Fig. 2. Thus, by rotating these shafts, the position of the belt 32 can be adjusted. The upper feed-belts are in two pairs, each of which consists of a long belt 47 or 60 and a shorter belt 46 or 61. The space between the ends of succeeding belts permits the flaps of the envelope to be turned over by the rails 153 and is partly occupied by spring-pressed rollers 77. The belt 46 may be adjusted transversely by an arm 54, Fig. 1, operated by a screw 56, and the belt 60 is adjusted by extensions 64. 68, Fig. 2, from the bar 39. The screwed shafts are all geared with one another so that rotation of one of these shafts simultaneously adjusts the whole of the feeding-devices. The blank then passes through the straightening, synchronizing, creasing, gumming, and folding mechanism which is described in Specification 11,525/14. The envelope is delivered from this mechanism between feed-belts 98, 111, Fig. 3, which run at a much slower speed than those previously described. This results in the envelopes being laid between the belts with the closing-flaps overlapping, the amount of overlap being varied at will by altering the speed of delivery. The overlapping envelopes are next passed over a roll 229 which applies a continuous layer of gum to the overlapping flaps, and are then carried over a blower 233 which dries the gnm. Finally, the finished envelopes are delivered at 141, Fig. 1, directly below the point of entry of the blanks into the machine.